EP 0139095 A2 19850502 - Display selection in a raster scan display system.
Title (en)
Display selection in a raster scan display system.
Title (de)
Bildauswahl in einem Rasteranzeigesystem.
Title (fr)
Sélection d'image dans un dispositif d'affichage à balayage à trame.
Publication
Application
Priority
US 52391583 A 19830816
Abstract (en)
In a raster scan digital display system, a display image is stored, as coded characters or a bit map, which is larger than the display image. In order to define an image, within the stored image, for display, the addressing system for the memory (or memories) storing the image include a display image defining circuit. This circuit includes an address counter which is incremented to define successive addresses of data in a line of the displayed image, or row of characters therein. The circuit includes a first register to receive the initial address of a display image and a second register to receive a value indicating the width of the stored image. For the initial line (or character row) of a displayed image, the address counter is loaded from the first register and incremented from the initial address. For each subsequent line (or character row) the address from which the counter is incremented is the sum of the initial address of the previous line (or character row) and the value in the second register.
IPC 1-7
IPC 8 full level
G09G 5/00 (2006.01); G09G 5/34 (2006.01); G09G 5/395 (2006.01)
CPC (source: EP KR US)
G06F 3/153 (2013.01 - KR); G09G 5/343 (2013.01 - EP US); G09G 5/346 (2013.01 - EP US); G09G 5/395 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
GB 2145308 A 19850320; GB 8416919 D0 19840808; AU 3137484 A 19850221; AU 566038 B2 19871008; BR 8404080 A 19850716; CA 1220293 A 19870407; EP 0139095 A2 19850502; EP 0139095 A3 19870819; ES 535132 A0 19850901; ES 8507708 A1 19850901; JP S6049391 A 19850318; KR 850002904 A 19850520; MX 157249 A 19881108; US 4570161 A 19860211
DOCDB simple family (application)
GB 8416919 A 19840703; AU 3137484 A 19840801; BR 8404080 A 19840815; CA 458370 A 19840706; EP 84107800 A 19840705; ES 535132 A 19840814; JP 14458184 A 19840713; KR 840004184 A 19840716; MX 20231684 A 19840809; US 52391583 A 19830816